renamed index_result -> binding

added lazy_binding
use boost::result_of when available


[SVN r28829]

libs/parameter

@@ -1 +1 @@
-Subproject commit 16d4028e333018a525142bf5ef081d2943ad90f1
+Subproject commit 99f20069d02253b3329a7b9c3bc1d36d94b5f6e4